SGI® 10-Gigabit Ethernet Adapter II User's Guide - SGI TechPubs ...
SGI® 10-Gigabit Ethernet Adapter II User's Guide - SGI TechPubs ...
SGI® 10-Gigabit Ethernet Adapter II User's Guide - SGI TechPubs ...
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The following entry dumps the current settings:<br />
cxgbtool intf qset<br />
NIC Acceleration Features<br />
The following entry updates the holdoff timer value for queue X to Y usecs:<br />
cxgbtool intf qset X lat Y<br />
The adapter supports all widespread acceleration features:<br />
• Checksum offload<br />
• TCP segmentation offload (TSO)<br />
• Large receive offload (LRO)<br />
Checksum offload and TSO are controlled through ethtool(8).<br />
NIC Acceleration Features<br />
Currently, ethtool(8) is not well suited to deal with hardware that supports multiple<br />
receive queues. The interface cxgbtool(8) provides the facility to control LRO on a<br />
per-recieve-queue basis. The following entry dumps the current settings:<br />
cxgbtool intf qset<br />
Software (SW) Stack Tuning<br />
The following entry disables/enables the LRO capability for queue X:<br />
cxgbtool intf qset X lro [0|1]<br />
The SW stack can be tuned to improve TCP performance as follows:<br />
Set net.core.wmem_max=”16777216”<br />
Set net.core.rmem_max=”16777216”<br />
Set net.ipv4.tcp_timestamps=”0”<br />
Set net.ipv4.tcp_rmem=”4096 262144 16777216”<br />
Set net.ipv4.tcp_wmem=”4096 262144 16777216”<br />
Set net.core.optmem_max=”524288”<br />
Set net.core.netdev_max_backlog=”200000”<br />
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